improving translator tool a lot :

improving translator tool a lot :
* managing strings with LIMITED pragma when the string is a koha intenral code too (like search)
* improving speed by 50 : just by reading the whole file before s///g, instead of doing a s///g on each line.
* NOT overwritting unchanged file => now, we can commit only what has changed !
* removing useless chars (., ?, spaces...) at end of strings.

WORKS on french OPAC AND INTRANET without problems.